阅读说明：本技术 附加制造装置、附加制造系统及附加制造方法 (Additive manufacturing apparatus, additive manufacturing system, and additive manufacturing method ) 是由 萱岛骏 鹫见信行 入口健二 鱼住诚二 于 2018-04-12 设计创作，主要内容包括：一种附加制造装置,其通过对加工头(3)进行控制而进行附加加工,该加工头(3)设置有：线材供给嘴(31),其向母材的表面的加工区域供给线材；光束源,其能够向线材的前端照射出光束；以及气体喷嘴(33),其在与线材供给嘴(31)之间隔着光束源而配置,向加工区域喷出气体,在附加制造装置中具有加工条件选择部,该加工条件选择部求出在沿照射出光束的方向观察时线材被供给的方向和加工头(3)的行进方向所成的角度,基于角度对附加加工的加工条件进行选择。(An additive manufacturing apparatus that performs additive machining by controlling a machining head (3), the machining head (3) being provided with: a wire supply nozzle (31) for supplying a wire to a processing area on the surface of the base material; a beam source capable of irradiating a beam to a tip end of the wire; and a gas nozzle (33) which is arranged with a beam source between the gas nozzle and the wire rod supply nozzle (31) and sprays gas to the processing area, wherein the additive manufacturing device is provided with a processing condition selection part which obtains an angle formed by the direction in which the wire rod is supplied and the advancing direction of the processing head (3) when observed along the direction of irradiating the light beam, and selects the processing condition of the additive processing based on the angle.)

1. An additive manufacturing apparatus that performs additive processing by controlling a processing head, the processing head being provided with: a wire rod supply nozzle for supplying a linear member to a processing region on the surface of the base material; a beam source capable of irradiating a beam to a tip of the linear member; and a gas nozzle which is disposed between the wire rod supply nozzle and the beam source and which discharges a gas to the processing area,

the additive manufacturing apparatus is characterized in that,

the machining condition selection unit obtains an angle formed by a direction in which the linear member is supplied and a direction in which the machining head travels when viewed in a direction in which the light beam is irradiated, and selects a machining condition for the additional machining based on the angle.

2. The additive manufacturing apparatus according to claim 1,

the machining condition table stores the machining conditions depending on the angle, and the machining condition selection unit obtains the angle based on a machining program that specifies a machining path and selects the machining conditions using the angle and the machining condition table.

3. The additive manufacturing apparatus according to claim 2,

in the machining condition table, an output value of the light beam and a gas pressure of the gas are stored as the machining condition depending on the angle.

4. The additive manufacturing apparatus according to claim 3,

in the machining condition table, a beam profile that defines an intensity change in an irradiation area of the beam is stored as the machining condition depending on the angle.

5. An additive manufacturing system that performs additive processing by controlling a processing head, the processing head being provided with: a wire rod supply nozzle for supplying a linear member to a processing region on the surface of the base material; a beam source capable of irradiating a beam to a tip of the linear member; and a gas nozzle which is disposed between the wire rod supply nozzle and the beam source and which discharges a gas to the processing area,

the additive manufacturing system is characterized by comprising:

a machining condition table in which machining conditions for the additional machining are stored, the machining conditions being dependent on an angle formed between a direction in which the linear member is supplied and a direction in which the machining head travels when viewed in a direction in which the beam is irradiated;

a machining condition selection unit that obtains the angle based on a machining path and selects the machining condition using the angle and the machining condition table; and

and a numerical control device that selects the machining condition based on the angle based on a machining program including information on the machining condition selected by the machining condition selection unit.

6. The additive manufacturing system according to claim 5,

in the machining condition table, an output value of the light beam and a gas pressure of the gas are stored as the machining condition depending on the angle.

7. The additive manufacturing system according to claim 6,

in the machining condition table, a beam profile that defines an intensity change in an irradiation area of the beam is stored as the machining condition depending on the angle.

8. An additive manufacturing method that performs additive machining by controlling a machining head, the machining head being provided with: a wire rod supply nozzle for supplying a linear member to a processing region on the surface of the base material; a beam source capable of irradiating a beam to a tip of the linear member; and a gas nozzle which is disposed between the wire rod supply nozzle and the beam source and which discharges a gas to the processing area,

the additive manufacturing method is characterized by comprising the following steps:

determining an angle formed by a direction in which the linear member is supplied and a traveling direction of the processing head when viewed in a direction in which the light beam is irradiated; and

the processing conditions for the additional processing are selected based on the angle.

Technical Field

The present invention relates to an additive manufacturing apparatus, an additive manufacturing system, and an additive manufacturing method for performing in-line additive manufacturing processing.

Background

In the wire additive manufacturing process, it is known that when the process is performed under predetermined process conditions, a shape error occurs with respect to an ideal bead shape depending on an angle difference between a feeding direction of a wire and a traveling direction of a process head. The machining conditions include beam output, gas pressure, and the like, and the ideal bead shape is a bead shape having a symmetrical cross-sectional shape and a constant ratio of the width to the height of the bead. The occurrence of the shape error of the bead shape is considered to be a case where the eccentricity of the bead shape whose cross-sectional shape is asymmetrical occurs, and the ratio of the width and the height of the bead deviates from a constant value.

Patent document 1 describes a relationship between the advancing direction of the machining and the eccentricity of the bead shape. Patent document 1 describes that if arc welding is performed while tilting a welding torch in one direction orthogonal to the welding travel direction and scanning the welding torch, non-uniform heat conduction to the base material becomes a cause, and eccentricity of the weld bead occurs.

Patent document 1: japanese patent laid-open publication No. 2013-146753

Disclosure of Invention

As a method of setting the shape of the weld bead to an ideal shape so that the angular difference between the feeding direction of the wire rod and the traveling direction of the machining head is always constant, there is a method of rotating the workpiece itself. However, in the case of this method, since it is necessary to mount a rotary table on the processing machine, there is a problem that the processing area becomes narrow, the number of axes of the machine increases, and the control becomes complicated. Therefore, in the wire additive manufacturing process, it is required to avoid the eccentricity of the bead shape by a simple control.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an additive manufacturing apparatus capable of preventing eccentricity of a bead shape by simple control.

In order to solve the above-described problems and achieve the object, an additive manufacturing apparatus according to the present invention performs additive machining by controlling a machining head, the machining head including: a wire rod supply nozzle for supplying a linear member to a processing region on the surface of the base material; a beam source capable of irradiating a beam to a tip of the linear member; and a gas nozzle which is disposed with the beam source interposed therebetween and ejects a gas toward the processing region. The present invention includes a processing condition selection unit that obtains an angle formed by a direction in which a linear member is supplied and a direction in which a processing head travels when viewed in a direction in which a light beam is irradiated, and selects a processing condition for additional processing based on the angle.

ADVANTAGEOUS EFFECTS OF INVENTION

The additive manufacturing apparatus according to the present invention has an effect of preventing the eccentricity of the bead shape by simple control.

Drawings

Fig. 1 is a block diagram showing a functional configuration of an additive manufacturing system according to embodiment 1 of the present invention.

Fig. 2 is a diagram showing a structure of a machining head according to embodiment 1.

Fig. 3 is a view showing comparative example 1 in which the direction in which the wire rod is fed and the direction in which the machining head travels are opposite directions.

Fig. 4 is a view showing a cross-sectional shape of the weld bead as viewed in the direction of the arrow in IV-IV of fig. 3.

Fig. 5 is a view showing comparative example 2 in which the direction in which the wire rod is fed and the direction in which the machining head travels are perpendicular to each other.

Fig. 6 is a view showing a cross-sectional shape of the weld bead as viewed in the direction of the arrow in VI-VI of fig. 5.

Fig. 7 is a view showing comparative example 3 in which the direction in which the wire rod is fed and the direction in which the machining head travels are the same.

Fig. 8 is a view of fig. 7 viewed in the Y direction parallel to the surface of the base material.

Fig. 9 is a view showing a cross-sectional shape of the weld bead as viewed in the direction of the arrow in IX-IX of fig. 8.

Fig. 10 is a diagram showing comparative example 4 in which the direction in which the wire rod is fed and the direction in which the machining head travels are opposite directions.

Fig. 11 is a view of fig. 10 viewed in the Y direction parallel to the surface of the base material.

Fig. 12 is a view showing a cross-sectional shape of the weld bead as viewed in the direction of the arrow in XII-XII of fig. 11.

Fig. 13 is a diagram showing a state in which the traveling direction of the processing head changes with respect to the direction in which the wire rod is supplied in embodiment 1.

Fig. 14 is an enlarged view of a portion surrounded by a one-dot chain line of fig. 13.

Fig. 15 is a diagram showing an example of a processing condition table according to embodiment 1.

Fig. 16 is a diagram illustrating selection of the processing conditions according to embodiment 1.

Fig. 17 is a diagram for explaining a beam profile of a laser beam according to embodiment 1.

Fig. 18 is a block diagram showing a functional configuration of the additive manufacturing system according to embodiment 2 of the present invention.

Fig. 19 is a diagram showing a hardware configuration in a case where the functions of the numerical control device according to embodiments 1 and 2 are realized by a computer system.

Detailed Description

Hereinafter, an additive manufacturing apparatus, an additive manufacturing system, and an additive manufacturing method according to embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to these embodiments.